After payment the cart is not updated

Hi
I have been informed by a customer who is testing the payment flow for me that after they paid the screen went back to the checkout stage and the cart hadn't been updated it still had the product visible so they thought the transaction hadn't taken place. When they clicked on Home it was gone but they were very confused .
Is this a bug or normal.

How do you rate me?

Thank you for rating your experience!

We’re thrilled to hear you had a great experience with . Would you like to leave a comment about your experience?
Thanks for voting on your experience with , we’d love to get some feedback please.
Ohh no! We’re really sorry to hear you didn’t have a pleasant experience with , we’re always looking at how we can improve and would appreciate you provide some further feedback here please.
Type your feedback here

it's great that you had a positive one. Based on your experience in this ticket would you please be kind enough to rate us externally on: